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Author SHA1 Message Date
Linus Torvalds
b70a2d6b29 Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 
Pull x86 fixes from Ingo Molnar:
 "Misc fixes:

   - three fixes and a cleanup for the resctrl code

   - a HyperV fix

   - a fix to /proc/kcore contents in live debugging sessions

   - a fix for the x86 decoder opcode map"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/decoder: Add TEST opcode to Group3-2
  x86/resctrl: Clean up unused function parameter in mkdir path
  x86/resctrl: Fix a deadlock due to inaccurate reference
  x86/resctrl: Fix use-after-free due to inaccurate refcount of rdtgroup
  x86/resctrl: Fix use-after-free when deleting resource groups
  x86/hyper-v: Add "polling" bit to hv_synic_sint
  x86/crash: Define arch_crash_save_vmcoreinfo() if CONFIG_CRASH_CORE=y
 2020-01-31 11:05:33 -08:00
Linus Torvalds
e813e65038 ARM: Cleanups and corner case fixes 
PPC: Bugfixes
 
 x86:
 * Support for mapping DAX areas with large nested page table entries.
 * Cleanups and bugfixes here too.  A particularly important one is
 a fix for FPU load when the thread has TIF_NEED_FPU_LOAD.  There is
 also a race condition which could be used in guest userspace to exploit
 the guest kernel, for which the embargo expired today.
 * Fast path for IPI delivery vmexits, shaving about 200 clock cycles
 from IPI latency.
 * Protect against "Spectre-v1/L1TF" (bring data in the cache via
 speculative out of bound accesses, use L1TF on the sibling hyperthread
 to read it), which unfortunately is an even bigger whack-a-mole game
 than SpectreV1.
 
 Sean continues his mission to rewrite KVM.  In addition to a sizable
 number of x86 patches, this time he contributed a pretty large refactoring
 of vCPU creation that affects all architectures but should not have any
 visible effect.
 
 s390 will come next week together with some more x86 patches.
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Merge tag 'kvm-5.6-1' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Pull KVM updates from Paolo Bonzini:
 "This is the first batch of KVM changes.

  ARM:
   - cleanups and corner case fixes.

  PPC:
   - Bugfixes

  x86:
   - Support for mapping DAX areas with large nested page table entries.

   - Cleanups and bugfixes here too. A particularly important one is a
     fix for FPU load when the thread has TIF_NEED_FPU_LOAD. There is
     also a race condition which could be used in guest userspace to
     exploit the guest kernel, for which the embargo expired today.

   - Fast path for IPI delivery vmexits, shaving about 200 clock cycles
     from IPI latency.

   - Protect against "Spectre-v1/L1TF" (bring data in the cache via
     speculative out of bound accesses, use L1TF on the sibling
     hyperthread to read it), which unfortunately is an even bigger
     whack-a-mole game than SpectreV1.

  Sean continues his mission to rewrite KVM. In addition to a sizable
  number of x86 patches, this time he contributed a pretty large
  refactoring of vCPU creation that affects all architectures but should
  not have any visible effect.

  s390 will come next week together with some more x86 patches"

* tag 'kvm-5.6-1' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (204 commits)
  x86/KVM: Clean up host's steal time structure
  x86/KVM: Make sure KVM_VCPU_FLUSH_TLB flag is not missed
  x86/kvm: Cache gfn to pfn translation
  x86/kvm: Introduce kvm_(un)map_gfn()
  x86/kvm: Be careful not to clear KVM_VCPU_FLUSH_TLB bit
  KVM: PPC: Book3S PR: Fix -Werror=return-type build failure
  KVM: PPC: Book3S HV: Release lock on page-out failure path
  KVM: arm64: Treat emulated TVAL TimerValue as a signed 32-bit integer
  KVM: arm64: pmu: Only handle supported event counters
  KVM: arm64: pmu: Fix chained SW_INCR counters
  KVM: arm64: pmu: Don't mark a counter as chained if the odd one is disabled
  KVM: arm64: pmu: Don't increment SW_INCR if PMCR.E is unset
  KVM: x86: Use a typedef for fastop functions
  KVM: X86: Add 'else' to unify fastop and execute call path
  KVM: x86: inline memslot_valid_for_gpte
  KVM: x86/mmu: Use huge pages for DAX-backed files
  KVM: x86/mmu: Remove lpage_is_disallowed() check from set_spte()
  KVM: x86/mmu: Fold max_mapping_level() into kvm_mmu_hugepage_adjust()
  KVM: x86/mmu: Zap any compound page when collapsing sptes
  KVM: x86/mmu: Remove obsolete gfn restoration in FNAME(fetch)
  ...
 2020-01-31 09:30:41 -08:00
Linus Torvalds
ccaaaf6fe5 MPX requires recompiling applications, which requires compiler support. 
Unfortunately, GCC 9.1 is expected to be be released without support for
 MPX.  This means that there was only a relatively small window where
 folks could have ever used MPX.  It failed to gain wide adoption in the
 industry, and Linux was the only mainstream OS to ever support it widely.
 
 Support for the feature may also disappear on future processors.
 
 This set completes the process that we started during the 5.4 merge window.
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Merge tag 'mpx-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/daveh/x86-mpx

Pull x86 MPX removal from Dave Hansen:
 "MPX requires recompiling applications, which requires compiler
  support. Unfortunately, GCC 9.1 is expected to be be released without
  support for MPX. This means that there was only a relatively small
  window where folks could have ever used MPX. It failed to gain wide
  adoption in the industry, and Linux was the only mainstream OS to ever
  support it widely.

  Support for the feature may also disappear on future processors.

  This set completes the process that we started during the 5.4 merge
  window when the MPX prctl()s were removed. XSAVE support is left in
  place, which allows MPX-using KVM guests to continue to function"

* tag 'mpx-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/daveh/x86-mpx:
  x86/mpx: remove MPX from arch/x86
  mm: remove arch_bprm_mm_init() hook
  x86/mpx: remove bounds exception code
  x86/mpx: remove build infrastructure
  x86/alternatives: add missing insn.h include
 2020-01-30 16:11:50 -08:00
Linus Torvalds
35c222fd32 MTD core 
* block2mtd: page index should use pgoff_t
 * maps: physmap: minimal Runtime PM support
 * maps: pcmciamtd: avoid possible sleep-in-atomic-context bugs
 * concat: Fix a comment referring to an unknown symbol
 
 Raw NAND
 * Macronix: Use match_string() helper
 * Atmel: switch to using devm_fwnode_gpiod_get()
 * Denali: rework the SKIP_BYTES feature and add reset controlling
 * Brcmnand: set appropriate DMA mask
 * Cadence: add unspecified HAS_IOMEM dependency
 * Various cleanup.
 
 Onenand
 * Rename Samsung and Omap2 drivers to avoid possible build warnings
 * Enable compile testing
 * Various build issues
 * Kconfig cleanup
 
 SPI-NAND
 * Support for Toshiba TC58CVG2S0HRAIJ
 
 SPI-NOR:
 - Add support for TB selection using SR bit 6,
 - Add support for few flashes.
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Merge tag 'mtd/for-5.6' of git://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux

Pull MTD updates from Miquel Raynal:
 "MTD core
   - block2mtd: page index should use pgoff_t
   - maps: physmap: minimal Runtime PM support
   - maps: pcmciamtd: avoid possible sleep-in-atomic-context bugs
   - concat: Fix a comment referring to an unknown symbol

  Raw NAND:
   - Macronix: Use match_string() helper
   - Atmel: switch to using devm_fwnode_gpiod_get()
   - Denali: rework the SKIP_BYTES feature and add reset controlling
   - Brcmnand: set appropriate DMA mask
   - Cadence: add unspecified HAS_IOMEM dependency
   - Various cleanup.

  Onenand:
   - Rename Samsung and Omap2 drivers to avoid possible build warnings
   - Enable compile testing
   - Various build issues
   - Kconfig cleanup

  SPI-NAND:
   - Support for Toshiba TC58CVG2S0HRAIJ

  SPI-NOR:
   - Add support for TB selection using SR bit 6,
   - Add support for few flashes"

* tag 'mtd/for-5.6' of git://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux: (41 commits)
  mtd: concat: Fix a comment referring to an unknown symbol
  mtd: rawnand: add unspecified HAS_IOMEM dependency
  mtd: block2mtd: page index should use pgoff_t
  mtd: maps: physmap: Add minimal Runtime PM support
  mtd: maps: pcmciamtd: fix possible sleep-in-atomic-context bugs in pcmciamtd_set_vpp()
  mtd: onenand: Rename omap2 driver to avoid a build warning
  mtd: onenand: Use a better name for samsung driver
  mtd: rawnand: atmel: switch to using devm_fwnode_gpiod_get()
  mtd: spinand: add support for Toshiba TC58CVG2S0HRAIJ
  mtd: rawnand: macronix: Use match_string() helper to simplify the code
  mtd: sharpslpart: Fix unsigned comparison to zero
  mtd: onenand: Enable compile testing of OMAP and Samsung drivers
  mtd: onenand: samsung: Fix printing format for size_t on 64-bit
  mtd: onenand: samsung: Fix pointer cast -Wpointer-to-int-cast warnings on 64 bit
  mtd: rawnand: denali: remove hard-coded DENALI_DEFAULT_OOB_SKIP_BYTES
  mtd: rawnand: denali_dt: add reset controlling
  dt-bindings: mtd: denali_dt: document reset property
  mtd: rawnand: denali_dt: Add support for configuring SPARE_AREA_SKIP_BYTES
  mtd: rawnand: denali_dt: error out if platform has no associated data
  mtd: rawnand: brcmnand: Set appropriate DMA mask
  ...
 2020-01-30 15:46:02 -08:00
Linus Torvalds
e84bcd61f6 This pull request contains mostly fixes for UBI and UBIFS: 
UBI:
  - Fixes for memory leaks in error paths
  - Fix for an logic error in a fastmap selfcheck
 
 UBIFS:
  - Fix for FS_IOC_SETFLAGS related to fscrypt flag
  - Support for FS_ENCRYPT_FL
  - Fix for a dead lock in bulk-read mode
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Merge tag 'upstream-5.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/ubifs

Pull UBI/UBIFS updates from Miquel Raynal:
 "This pull request contains mostly fixes for UBI and UBIFS:

  UBI:
   - Fixes for memory leaks in error paths
   - Fix for an logic error in a fastmap selfcheck

  UBIFS:
   - Fix for FS_IOC_SETFLAGS related to fscrypt flag
   - Support for FS_ENCRYPT_FL
   - Fix for a dead lock in bulk-read mode"

Sent on behalf of Richard Weinberger who is traveling.

* tag 'upstream-5.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/ubifs:
  ubi: Fix an error pointer dereference in error handling code
  ubifs: Fix memory leak from c->sup_node
  ubifs: Fix ino_t format warnings in orphan_delete()
  ubifs: Fix deadlock in concurrent bulk-read and writepage
  ubifs: Fix wrong memory allocation
  ubi: Free the normal volumes in error paths of ubi_attach_mtd_dev()
  ubi: Check the presence of volume before call ubi_fastmap_destroy_checkmap()
  ubifs: Add support for FS_ENCRYPT_FL
  ubifs: Fix FS_IOC_SETFLAGS unexpectedly clearing encrypt flag
  ubi: wl: Remove set but not used variable 'prev_e'
  ubi: fastmap: Fix inverted logic in seen selfcheck
 2020-01-30 15:44:12 -08:00
Linus Torvalds
6e135baed8 f2fs-for-5.6 
In this series, we've implemented transparent compression experimentally. It
 supports LZO and LZ4, but will add more later as we investigate in the field
 more. At this point, the feature doesn't expose compressed space to user
 directly in order to guarantee potential data updates later to the space.
 Instead, the main goal is to reduce data writes to flash disk as much as
 possible, resulting in extending disk life time as well as relaxing IO
 congestion. Alternatively, we're also considering to add ioctl() to reclaim
 compressed space and show it to user after putting the immutable bit.
 
 Enhancement:
  - add compression support
  - avoid unnecessary locks in quota ops
  - harden power-cut scenario for zoned block devices
  - use private bio_set to avoid IO congestion
  - replace GC mutex with rwsem to serialize callers
 
 Bug fix:
  - fix dentry consistency and memory corruption in rename()'s error case
  - fix wrong swap extent reports
  - fix casefolding bugs
  - change lock coverage to avoid deadlock
  - avoid GFP_KERNEL under f2fs_lock_op
 
 And, we've cleaned up sysfs entries to prepare no debugfs.
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Merge tag 'f2fs-for-5.6' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs

Pull f2fs updates from Jaegeuk Kim:
 "In this series, we've implemented transparent compression
  experimentally. It supports LZO and LZ4, but will add more later as we
  investigate in the field more.

  At this point, the feature doesn't expose compressed space to user
  directly in order to guarantee potential data updates later to the
  space. Instead, the main goal is to reduce data writes to flash disk
  as much as possible, resulting in extending disk life time as well as
  relaxing IO congestion.

  Alternatively, we're also considering to add ioctl() to reclaim
  compressed space and show it to user after putting the immutable bit.

  Enhancements:
   - add compression support
   - avoid unnecessary locks in quota ops
   - harden power-cut scenario for zoned block devices
   - use private bio_set to avoid IO congestion
   - replace GC mutex with rwsem to serialize callers

  Bug fixes:
   - fix dentry consistency and memory corruption in rename()'s error case
   - fix wrong swap extent reports
   - fix casefolding bugs
   - change lock coverage to avoid deadlock
   - avoid GFP_KERNEL under f2fs_lock_op

  And, we've cleaned up sysfs entries to prepare no debugfs"

* tag 'f2fs-for-5.6' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs: (31 commits)
  f2fs: fix race conditions in ->d_compare() and ->d_hash()
  f2fs: fix dcache lookup of !casefolded directories
  f2fs: Add f2fs stats to sysfs
  f2fs: delete duplicate information on sysfs nodes
  f2fs: change to use rwsem for gc_mutex
  f2fs: update f2fs document regarding to fsync_mode
  f2fs: add a way to turn off ipu bio cache
  f2fs: code cleanup for f2fs_statfs_project()
  f2fs: fix miscounted block limit in f2fs_statfs_project()
  f2fs: show the CP_PAUSE reason in checkpoint traces
  f2fs: fix deadlock allocating bio_post_read_ctx from mempool
  f2fs: remove unneeded check for error allocating bio_post_read_ctx
  f2fs: convert inline_dir early before starting rename
  f2fs: fix memleak of kobject
  f2fs: fix to add swap extent correctly
  f2fs: run fsck when getting bad inode during GC
  f2fs: support data compression
  f2fs: free sysfs kobject
  f2fs: declare nested quota_sem and remove unnecessary sems
  f2fs: don't put new_page twice in f2fs_rename
  ...
 2020-01-30 15:39:24 -08:00
Linus Torvalds
0196be12aa \n 
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Merge tag 'for_v5.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs

Pull UDF, quota, reiserfs, ext2 fixes and cleanups from Jan Kara:
 "A few assorted fixes and cleanups for udf, quota, reiserfs, and ext2"

* tag 'for_v5.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
  fs/reiserfs: remove unused macros
  fs/quota: remove unused macro
  udf: Clarify meaning of f_files in udf_statfs
  udf: Allow writing to 'Rewritable' partitions
  udf: Disallow R/W mode for disk with Metadata partition
  udf: Fix meaning of ENTITYID_FLAGS_* macros to be really bitwise-or flags
  udf: Fix free space reporting for metadata and virtual partitions
  udf: Update header files to UDF 2.60
  udf: Move OSTA Identifier Suffix macros from ecma_167.h to osta_udf.h
  udf: Fix spelling in EXT_NEXT_EXTENT_ALLOCDESCS
  ext2: Adjust indentation in ext2_fill_super
  quota: avoid time_t in v1_disk_dqblk definition
  reiserfs: Fix spurious unlock in reiserfs_fill_super() error handling
  reiserfs: Fix memory leak of journal device string
  ext2: set proper errno in error case of ext2_fill_super()
 2020-01-30 15:37:41 -08:00
Linus Torvalds
91f1a9566f New code for 5.6: 
- Get rid of compat_time_t
 - Convert time_t to time64_t in quota code
 - Remove shadow variables
 - Prevent ATTR_ flag misuse in the attrmulti ioctls
 - Clean out strlen in the attr code
 - Remove some bogus asserts
 - Fix various file size limit calculation errors with 32-bit kernels
 - Pack xfs_dir2_sf_entry_t to fix build errors on arm oabi
 - Fix nowait inode locking calls for directio aio reads.
 - Fix memory corruption bugs when invalidating remote xattr value
   buffers.
 - Streamline remote attr value removal.
 - Make the buffer log format size consistent across platforms.
 - Strengthen buffer log format size checking.
 - Fix messed up return types of xfs_inode_need_cow.
 - Fix some unused variable warnings.
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Merge tag 'xfs-5.6-merge-6' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux

Pull xfs updates from Darrick Wong:
 "In this release we clean out the last of the old 32-bit timestamp
  code, fix a number of bugs and memory corruptions on 32-bit platforms,
  and a refactoring of some of the extended attribute code.

  I think I'll be back next week with some refactoring of how the XFS
  buffer code returns error codes, however I prefer to hold onto that
  for another week to let it soak a while longer

  Summary:

   - Get rid of compat_time_t

   - Convert time_t to time64_t in quota code

   - Remove shadow variables

   - Prevent ATTR_ flag misuse in the attrmulti ioctls

   - Clean out strlen in the attr code

   - Remove some bogus asserts

   - Fix various file size limit calculation errors with 32-bit kernels

   - Pack xfs_dir2_sf_entry_t to fix build errors on arm oabi

   - Fix nowait inode locking calls for directio aio reads

   - Fix memory corruption bugs when invalidating remote xattr value
     buffers

   - Streamline remote attr value removal

   - Make the buffer log format size consistent across platforms

   - Strengthen buffer log format size checking

   - Fix messed up return types of xfs_inode_need_cow

   - Fix some unused variable warnings"

* tag 'xfs-5.6-merge-6' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux: (24 commits)
  xfs: remove unused variable 'done'
  xfs: fix uninitialized variable in xfs_attr3_leaf_inactive
  xfs: change return value of xfs_inode_need_cow to int
  xfs: check log iovec size to make sure it's plausibly a buffer log format
  xfs: make struct xfs_buf_log_format have a consistent size
  xfs: complain if anyone tries to create a too-large buffer log item
  xfs: clean up xfs_buf_item_get_format return value
  xfs: streamline xfs_attr3_leaf_inactive
  xfs: fix memory corruption during remote attr value buffer invalidation
  xfs: refactor remote attr value buffer invalidation
  xfs: fix IOCB_NOWAIT handling in xfs_file_dio_aio_read
  xfs: Add __packed to xfs_dir2_sf_entry_t definition
  xfs: fix s_maxbytes computation on 32-bit kernels
  xfs: truncate should remove all blocks, not just to the end of the page cache
  xfs: introduce XFS_MAX_FILEOFF
  xfs: remove bogus assertion when online repair isn't enabled
  xfs: Remove all strlen in all xfs_attr_* functions for attr names.
  xfs: fix misuse of the XFS_ATTR_INCOMPLETE flag
  xfs: also remove cached ACLs when removing the underlying attr
  xfs: reject invalid flags combinations in XFS_IOC_ATTRMULTI_BY_HANDLE
  ...
 2020-01-30 15:24:24 -08:00
Linus Torvalds
e5da4c933c This merge window, we've added some performance improvements in how we 
handle inode locking in the read/write paths, and improving the
 performance of Direct I/O overwrites.  We also now record the error
 code which caused the first and most recent ext4_error() report in the
 superblock, to make it easier to root cause problems in production
 systems.  There are also many of the usual cleanups and miscellaneous
 bug fixes.
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Merge tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4

Pull ext4 updates from Ted Ts'o:
 "This merge window, we've added some performance improvements in how we
  handle inode locking in the read/write paths, and improving the
  performance of Direct I/O overwrites.

  We also now record the error code which caused the first and most
  recent ext4_error() report in the superblock, to make it easier to
  root cause problems in production systems.

  There are also many of the usual cleanups and miscellaneous bug fixes"

* tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: (49 commits)
  jbd2: clean __jbd2_journal_abort_hard() and __journal_abort_soft()
  jbd2: make sure ESHUTDOWN to be recorded in the journal superblock
  ext4, jbd2: ensure panic when aborting with zero errno
  jbd2: switch to use jbd2_journal_abort() when failed to submit the commit record
  jbd2_seq_info_next should increase position index
  jbd2: remove pointless assertion in __journal_remove_journal_head
  ext4,jbd2: fix comment and code style
  jbd2: delete the duplicated words in the comments
  ext4: fix extent_status trace points
  ext4: fix symbolic enum printing in trace output
  ext4: choose hardlimit when softlimit is larger than hardlimit in ext4_statfs_project()
  ext4: fix race conditions in ->d_compare() and ->d_hash()
  ext4: make dioread_nolock the default
  ext4: fix extent_status fragmentation for plain files
  jbd2: clear JBD2_ABORT flag before journal_reset to update log tail info when load journal
  ext4: drop ext4_kvmalloc()
  ext4: Add EXT4_IOC_FSGETXATTR/EXT4_IOC_FSSETXATTR to compat_ioctl
  ext4: remove unused macro MPAGE_DA_EXTENT_TAIL
  ext4: add missing braces in ext4_ext_drop_refs()
  ext4: fix some nonstandard indentation in extents.c
  ...
 2020-01-30 15:17:05 -08:00
Paolo Bonzini
4cbc418a44 Merge branch 'cve-2019-3016' into kvm-next-5.6 
From Boris Ostrovsky:

The KVM hypervisor may provide a guest with ability to defer remote TLB
flush when the remote VCPU is not running. When this feature is used,
the TLB flush will happen only when the remote VPCU is scheduled to run
again. This will avoid unnecessary (and expensive) IPIs.

Under certain circumstances, when a guest initiates such deferred action,
the hypervisor may miss the request. It is also possible that the guest
may mistakenly assume that it has already marked remote VCPU as needing
a flush when in fact that request had already been processed by the
hypervisor. In both cases this will result in an invalid translation
being present in a vCPU, potentially allowing accesses to memory locations
in that guest's address space that should not be accessible.

Note that only intra-guest memory is vulnerable.

The five patches address both of these problems:
1. The first patch makes sure the hypervisor doesn't accidentally clear
a guest's remote flush request
2. The rest of the patches prevent the race between hypervisor
acknowledging a remote flush request and guest issuing a new one.

Conflicts:
	arch/x86/kvm/x86.c [move from kvm_arch_vcpu_free to kvm_arch_vcpu_destroy]
 2020-01-30 18:47:59 +01:00
Boris Ostrovsky
a6bd811f12 x86/KVM: Clean up host's steal time structure 
Now that we are mapping kvm_steal_time from the guest directly we
don't need keep a copy of it in kvm_vcpu_arch.st. The same is true
for the stime field.

This is part of CVE-2019-3016.

Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Reviewed-by: Joao Martins <joao.m.martins@oracle.com>
Cc: stable@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
 2020-01-30 18:45:55 +01:00
Boris Ostrovsky
b043138246 x86/KVM: Make sure KVM_VCPU_FLUSH_TLB flag is not missed 
There is a potential race in record_steal_time() between setting
host-local vcpu->arch.st.steal.preempted to zero (i.e. clearing
KVM_VCPU_PREEMPTED) and propagating this value to the guest with
kvm_write_guest_cached(). Between those two events the guest may
still see KVM_VCPU_PREEMPTED in its copy of kvm_steal_time, set
KVM_VCPU_FLUSH_TLB and assume that hypervisor will do the right
thing. Which it won't.

Instad of copying, we should map kvm_steal_time and that will
guarantee atomicity of accesses to @preempted.

This is part of CVE-2019-3016.

Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Reviewed-by: Joao Martins <joao.m.martins@oracle.com>
Cc: stable@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
 2020-01-30 18:45:55 +01:00
Boris Ostrovsky
917248144d x86/kvm: Cache gfn to pfn translation 
__kvm_map_gfn()'s call to gfn_to_pfn_memslot() is
* relatively expensive
* in certain cases (such as when done from atomic context) cannot be called

Stashing gfn-to-pfn mapping should help with both cases.

This is part of CVE-2019-3016.

Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Reviewed-by: Joao Martins <joao.m.martins@oracle.com>
Cc: stable@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
 2020-01-30 18:45:55 +01:00
Boris Ostrovsky
1eff70a9ab x86/kvm: Introduce kvm_(un)map_gfn() 
kvm_vcpu_(un)map operates on gfns from any current address space.
In certain cases we want to make sure we are not mapping SMRAM
and for that we can use kvm_(un)map_gfn() that we are introducing
in this patch.

This is part of CVE-2019-3016.

Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Reviewed-by: Joao Martins <joao.m.martins@oracle.com>
Cc: stable@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
 2020-01-30 18:45:54 +01:00
Boris Ostrovsky
8c6de56a42 x86/kvm: Be careful not to clear KVM_VCPU_FLUSH_TLB bit 
kvm_steal_time_set_preempted() may accidentally clear KVM_VCPU_FLUSH_TLB
bit if it is called more than once while VCPU is preempted.

This is part of CVE-2019-3016.

(This bug was also independently discovered by Jim Mattson
<jmattson@google.com>)

Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Reviewed-by: Joao Martins <joao.m.martins@oracle.com>
Cc: stable@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
 2020-01-30 18:45:54 +01:00
Paolo Bonzini
1d5920c306 Second KVM PPC update for 5.6 
* Fix compile warning on 32-bit machines
 * Fix locking error in secure VM support
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Merge tag 'kvm-ppc-next-5.6-2' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc into HEAD

Second KVM PPC update for 5.6

* Fix compile warning on 32-bit machines
* Fix locking error in secure VM support
 2020-01-30 18:14:26 +01:00
Paolo Bonzini
621ab20c06 KVM/arm updates for Linux 5.6 
- Fix MMIO sign extension
 - Fix HYP VA tagging on tag space exhaustion
 - Fix PSTATE/CPSR handling when generating exception
 - Fix MMU notifier's advertizing of young pages
 - Fix poisoned page handling
 - Fix PMU SW event handling
 - Fix TVAL register access
 - Fix AArch32 external abort injection
 - Fix ITS unmapped collection handling
 - Various cleanups
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Merge tag 'kvmarm-5.6' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD

KVM/arm updates for Linux 5.6

- Fix MMIO sign extension
- Fix HYP VA tagging on tag space exhaustion
- Fix PSTATE/CPSR handling when generating exception
- Fix MMU notifier's advertizing of young pages
- Fix poisoned page handling
- Fix PMU SW event handling
- Fix TVAL register access
- Fix AArch32 external abort injection
- Fix ITS unmapped collection handling
- Various cleanups
 2020-01-30 18:13:14 +01:00
Linus Torvalds
9f68e3655a drm pull for 5.6-rc1 
uapi:
 - dma-buf heaps added (and fixed)
 - command line add support for panel oreientation
 - command line allow overriding penguin count
 
 drm:
 - mipi dsi definition updates
 - lockdep annotations for dma_resv
 - remove dma-buf kmap/kunmap support
 - constify fb_ops in all fbdev drivers
 - MST fix for daisy chained hotplug-
 - CTA-861-G modes with VIC >= 193 added
 - fix drm_panel_of_backlight export
 - LVDS decoder support
 - more device based logging support
 - scanline alighment for dumb buffers
 - MST DSC helpers
 
 scheduler:
 - documentation fixes
 - job distribution improvements
 
 panel:
 - Logic PD type 28 panel support
 - Jimax8729d MIPI-DSI
 - igenic JZ4770
 - generic DSI devicetree bindings
 - sony acx424AKP panel
 - Leadtek LTK500HD1829
 - xinpeng XPP055C272
 - AUO B116XAK01
 - GiantPlus GPM940B0
 - BOE NV140FHM-N49
 - Satoz SAT050AT40H12R2
 - Sharp LS020B1DD01D panels.
 
 ttm:
 - use blocking WW lock
 
 i915:
 - hw/uapi state separation
 - Lock annotation improvements
 - selftest improvements
 - ICL/TGL DSI VDSC support
 - VBT parsing improvments
 - Display refactoring
 - DSI updates + fixes
 - HDCP 2.2 for CFL
 - CML PCI ID fixes
 - GLK+ fbc fix
 - PSR fixes
 - GEN/GT refactor improvments
 - DP MST fixes
 - switch context id alloc to xarray
 - workaround updates
 - LMEM debugfs support
 - tiled monitor fixes
 - ICL+ clock gating programming removed
 - DP MST disable sequence fixed
 - LMEM discontiguous object maps
 - prefaulting for discontiguous objects
 - use LMEM for dumb buffers if possible
 - add LMEM mmap support
 
 amdgpu:
 - enable sync object timelines for vulkan
 - MST atomic routines
 - enable MST DSC support
 - add DMCUB display microengine support
 - DC OEM i2c support
 - Renoir DC fixes
 - Initial HDCP 2.x support
 - BACO support for Arcturus
 - Use BACO for runtime PM power save
 - gfxoff on navi10
 - gfx10 golden updates and fixes
 - DCN support on POWER
 - GFXOFF for raven1 refresh
 - MM engine idle handlers cleanup
 - 10bpc EDP panel fixes
 - renoir watermark fixes
 - SR-IOV fixes
 - Arcturus VCN fixes
 - GDDR6 training fixes
 - freesync fixes
 - Pollock support
 
 amdkfd:
 - unify more codepath with amdgpu
 - use KIQ to setup HIQ rather than MMIO
 
 radeon:
 - fix vma fault handler race
 - PPC DMA fix
 - register check fixes for r100/r200
 
 nouveau:
 - mmap_sem vs dma_resv fix
 - rewrite the ACR secure boot code for Turing
 - TU10x graphics engine support (TU11x pending)
 - Page kind mapping for turing
 - 10-bit LUT support
 - GP10B Tegra fixes
 - HD audio regression fix
 
 hisilicon/hibmc:
 - use generic fbdev code and helpers
 
 rockchip:
 - dsi/px30 support
 
 virtio:
 - fb damage support
 - static some functions
 
 vc4:
 - use dma_resv lock wrappers
 
 msm:
 - use dma_resv lock wrappers
 - sc7180 display + DSI support
 - a618 support
 - UBWC support improvements
 
 vmwgfx:
 - updates + new logging uapi
 
 exynos:
 - enable/disable callback cleanups
 
 etnaviv:
 - use dma_resv lock wrappers
 
 atmel-hlcdc:
 - clock fixes
 
 mediatek:
 - cmdq support
 - non-smooth cursor fixes
 - ctm property support
 
 sun4i:
 - suspend support
 - A64 mipi dsi support
 
 rcar-du:
 - Color management module support
 - LVDS encoder dual-link support
 - R8A77980 support
 
 analogic:
 - add support for an6345
 
 ast:
 - atomic modeset support
 - primary plane garbage fix
 
 arcgpu:
 - fixes for fourcc handling
 
 tegra:
 - minor fixes and improvments
 
 mcde:
 - vblank support
 
 meson:
 - OSD1 plane AFBC commit
 
 gma500:
 - add pageflip support
 - reomve global drm_dev
 
 komeda:
 - tweak debugfs output
 - d32 support
 - runtime PM suppotr
 
 udl:
 - use generic shmem helpers
 - cleanup and fixes
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Merge tag 'drm-next-2020-01-30' of git://anongit.freedesktop.org/drm/drm

Pull drm updates from Davbe Airlie:
 "This is the main pull request for graphics for 5.6. Usual selection of
  changes all over.

  I've got one outstanding vmwgfx pull that touches mm so kept it
  separate until after all of this lands. I'll try and get it to you
  soon after this, but it might be early next week (nothing wrong with
  code, just my schedule is messy)

  This also hits a lot of fbdev drivers with some cleanups.

  Other notables:
   - vulkan timeline semaphore support added to syncobjs
   - nouveau turing secureboot/graphics support
   - Displayport MST display stream compression support

  Detailed summary:

  uapi:
   - dma-buf heaps added (and fixed)
   - command line add support for panel oreientation
   - command line allow overriding penguin count

  drm:
   - mipi dsi definition updates
   - lockdep annotations for dma_resv
   - remove dma-buf kmap/kunmap support
   - constify fb_ops in all fbdev drivers
   - MST fix for daisy chained hotplug-
   - CTA-861-G modes with VIC >= 193 added
   - fix drm_panel_of_backlight export
   - LVDS decoder support
   - more device based logging support
   - scanline alighment for dumb buffers
   - MST DSC helpers

  scheduler:
   - documentation fixes
   - job distribution improvements

  panel:
   - Logic PD type 28 panel support
   - Jimax8729d MIPI-DSI
   - igenic JZ4770
   - generic DSI devicetree bindings
   - sony acx424AKP panel
   - Leadtek LTK500HD1829
   - xinpeng XPP055C272
   - AUO B116XAK01
   - GiantPlus GPM940B0
   - BOE NV140FHM-N49
   - Satoz SAT050AT40H12R2
   - Sharp LS020B1DD01D panels.

  ttm:
   - use blocking WW lock

  i915:
   - hw/uapi state separation
   - Lock annotation improvements
   - selftest improvements
   - ICL/TGL DSI VDSC support
   - VBT parsing improvments
   - Display refactoring
   - DSI updates + fixes
   - HDCP 2.2 for CFL
   - CML PCI ID fixes
   - GLK+ fbc fix
   - PSR fixes
   - GEN/GT refactor improvments
   - DP MST fixes
   - switch context id alloc to xarray
   - workaround updates
   - LMEM debugfs support
   - tiled monitor fixes
   - ICL+ clock gating programming removed
   - DP MST disable sequence fixed
   - LMEM discontiguous object maps
   - prefaulting for discontiguous objects
   - use LMEM for dumb buffers if possible
   - add LMEM mmap support

  amdgpu:
   - enable sync object timelines for vulkan
   - MST atomic routines
   - enable MST DSC support
   - add DMCUB display microengine support
   - DC OEM i2c support
   - Renoir DC fixes
   - Initial HDCP 2.x support
   - BACO support for Arcturus
   - Use BACO for runtime PM power save
   - gfxoff on navi10
   - gfx10 golden updates and fixes
   - DCN support on POWER
   - GFXOFF for raven1 refresh
   - MM engine idle handlers cleanup
   - 10bpc EDP panel fixes
   - renoir watermark fixes
   - SR-IOV fixes
   - Arcturus VCN fixes
   - GDDR6 training fixes
   - freesync fixes
   - Pollock support

  amdkfd:
   - unify more codepath with amdgpu
   - use KIQ to setup HIQ rather than MMIO

  radeon:
   - fix vma fault handler race
   - PPC DMA fix
   - register check fixes for r100/r200

  nouveau:
   - mmap_sem vs dma_resv fix
   - rewrite the ACR secure boot code for Turing
   - TU10x graphics engine support (TU11x pending)
   - Page kind mapping for turing
   - 10-bit LUT support
   - GP10B Tegra fixes
   - HD audio regression fix

  hisilicon/hibmc:
   - use generic fbdev code and helpers

  rockchip:
   - dsi/px30 support

  virtio:
   - fb damage support
   - static some functions

  vc4:
   - use dma_resv lock wrappers

  msm:
   - use dma_resv lock wrappers
   - sc7180 display + DSI support
   - a618 support
   - UBWC support improvements

  vmwgfx:
   - updates + new logging uapi

  exynos:
   - enable/disable callback cleanups

  etnaviv:
   - use dma_resv lock wrappers

  atmel-hlcdc:
   - clock fixes

  mediatek:
   - cmdq support
   - non-smooth cursor fixes
   - ctm property support

  sun4i:
   - suspend support
   - A64 mipi dsi support

  rcar-du:
   - Color management module support
   - LVDS encoder dual-link support
   - R8A77980 support

  analogic:
   - add support for an6345

  ast:
   - atomic modeset support
   - primary plane garbage fix

  arcgpu:
   - fixes for fourcc handling

  tegra:
   - minor fixes and improvments

  mcde:
   - vblank support

  meson:
   - OSD1 plane AFBC commit

  gma500:
   - add pageflip support
   - reomve global drm_dev

  komeda:
   - tweak debugfs output
   - d32 support
   - runtime PM suppotr

  udl:
   - use generic shmem helpers
   - cleanup and fixes"

* tag 'drm-next-2020-01-30' of git://anongit.freedesktop.org/drm/drm: (1998 commits)
  drm/nouveau/fb/gp102-: allow module to load even when scrubber binary is missing
  drm/nouveau/acr: return error when registering LSF if ACR not supported
  drm/nouveau/disp/gv100-: not all channel types support reporting error codes
  drm/nouveau/disp/nv50-: prevent oops when no channel method map provided
  drm/nouveau: support synchronous pushbuf submission
  drm/nouveau: signal pending fences when channel has been killed
  drm/nouveau: reject attempts to submit to dead channels
  drm/nouveau: zero vma pointer even if we only unreference it rather than free
  drm/nouveau: Add HD-audio component notifier support
  drm/nouveau: fix build error without CONFIG_IOMMU_API
  drm/nouveau/kms/nv04: remove set but not used variable 'width'
  drm/nouveau/kms/nv50: remove set but not unused variable 'nv_connector'
  drm/nouveau/mmu: fix comptag memory leak
  drm/nouveau/gr/gp10b: Use gp100_grctx and gp100_gr_zbc
  drm/nouveau/pmu/gm20b,gp10b: Fix Falcon bootstrapping
  drm/exynos: Rename Exynos to lowercase
  drm/exynos: change callback names
  drm/mst: Don't do atomic checks over disabled managers
  drm/amdgpu: add the lost mutex_init back
  drm/amd/display: skip opp blank or unblank if test pattern enabled
  ...
 2020-01-30 08:04:01 -08:00
Linus Torvalds
4cadc60d6b power supply and reset changes for the v5.6 series 
Core:
  * Add battery internal resistance temperature table support
 
 Drivers:
  * sc27xx: Optimize the battery resistance with measuring temperature
  * max17042-battery: Add MAX17055 support
  * bq25890-charger: Add support of BQ25892 and BQ25896 chips
  * misc. fixes
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Merge tag 'for-v5.6' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply

Pull power supply and reset updates from Sebastian Reichel:
 "Core:
   - Add battery internal resistance temperature table support

  Drivers:
   - sc27xx: Optimize the battery resistance with measuring temperature
   - max17042-battery: Add MAX17055 support
   - bq25890-charger: Add support of BQ25892 and BQ25896 chips
   - misc fixes"

* tag 'for-v5.6' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply: (44 commits)
  power: supply: ipaq_micro_battery: remove unneeded semicolon
  power: supply: bq25890_charger: fix incorrect error return when bq25890_field_read fails
  power: supply: axp20x_usb_power: Only poll while offline
  power: supply: axp20x_usb_power: Add wakeup control
  power: supply: axp20x_usb_power: Allow offlining
  power: supply: axp20x_usb_power: Use a match structure
  power: suppy: ucs1002: Make the symbol 'ucs1002_regulator_enable' static
  power: reset: at91-poweroff: use proper master clock register offset
  power: reset: at91-poweroff: introduce struct shdwc_reg_config
  power: supply: bq25890_charger: Add DT and I2C ids for all supported chips
  dt-bindings: Add new chips to bq25890 binding documentation
  power: supply: bq25890_charger: Add support of BQ25892 and BQ25896 chips
  power: supply: core: Update sysfs-class-power ABI document
  power: supply: sbs-battery: Fix a signedness bug in sbs_get_battery_capacity()
  power: supply: ltc2941-battery-gauge: fix use-after-free
  power: supply: max17040: Correct IRQ wake handling
  power: supply: axp20x_usb_power: Remove unused device_node
  power: supply: axp20x_ac_power: Add wakeup control
  power: supply: axp20x_ac_power: Allow offlining
  power: supply: axp20x_ac_power: Fix reporting online status
  ...
 2020-01-30 07:51:24 -08:00
Linus Torvalds
893e591b59 Devicetree updates for v5.6: 
- Update dtc to upstream v1.5.1-22-gc40aeb60b47a (plus 1 revert)
 
 - Fix for DMA coherent devices on Power
 
 - Rework and simplify the DT phandle cache code
 
 - DT schema conversions for LEDS, gpio-leds, STM32 dfsdm, STM32 UART,
   STM32 ROMEM, STM32 watchdog, STM32 DMAs, STM32 mlahb, STM32 RTC,
   STM32 RCC, STM32 syscon, rs485, Renesas rCar CSI2, Faraday FTIDE010,
   DWC2, Arm idle-states, Allwinner legacy resets, PRCM and clocks,
   Allwinner H6 OPP, Allwinner AHCI, Allwinner MBUS, Allwinner A31 CSI,
   Allwinner h/w codec, Allwinner A10 system ctrl, Allwinner SRAM,
   Allwinner USB PHY, Renesas CEU, generic PCI host, Arm Versatile PCI
 
 - New binding schemas for SATA and PATA controllers, TI and Infineon VR
   controllers, MAX31730
 
 - New compatible strings for i.MX8QM, WCN3991, renesas,r8a77961-wdt,
   renesas,etheravb-r8a77961
 
 - Add USB 'super-speed-plus' as a documented speed
 
 - Vendor prefixes for broadmobi, calaosystems, kam, and mps
 
 - Clean-up the multiple flavors of ST-Ericsson vendor prefixes
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Merge tag 'devicetree-for-5.6' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux

Pull devicetree updates from Rob Herring:

 - Update dtc to upstream v1.5.1-22-gc40aeb60b47a (plus 1 revert)

 - Fix for DMA coherent devices on Power

 - Rework and simplify the DT phandle cache code

 - DT schema conversions for LEDS, gpio-leds, STM32 dfsdm, STM32 UART,
   STM32 ROMEM, STM32 watchdog, STM32 DMAs, STM32 mlahb, STM32 RTC,
   STM32 RCC, STM32 syscon, rs485, Renesas rCar CSI2, Faraday FTIDE010,
   DWC2, Arm idle-states, Allwinner legacy resets, PRCM and clocks,
   Allwinner H6 OPP, Allwinner AHCI, Allwinner MBUS, Allwinner A31 CSI,
   Allwinner h/w codec, Allwinner A10 system ctrl, Allwinner SRAM,
   Allwinner USB PHY, Renesas CEU, generic PCI host, Arm Versatile PCI

 - New binding schemas for SATA and PATA controllers, TI and Infineon VR
   controllers, MAX31730

 - New compatible strings for i.MX8QM, WCN3991, renesas,r8a77961-wdt,
   renesas,etheravb-r8a77961

 - Add USB 'super-speed-plus' as a documented speed

 - Vendor prefixes for broadmobi, calaosystems, kam, and mps

 - Clean-up the multiple flavors of ST-Ericsson vendor prefixes

* tag 'devicetree-for-5.6' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: (66 commits)
  scripts/dtc: Revert "yamltree: Ensure consistent bracketing of properties with phandles"
  of: Add OF_DMA_DEFAULT_COHERENT & select it on powerpc
  dt-bindings: leds: Convert gpio-leds to DT schema
  dt-bindings: leds: Convert common LED binding to schema
  dt-bindings: PCI: Convert generic host binding to DT schema
  dt-bindings: PCI: Convert Arm Versatile binding to DT schema
  dt-bindings: Be explicit about installing deps
  dt-bindings: stm32: convert dfsdm to json-schema
  dt-bindings: serial: Convert STM32 UART to json-schema
  dt-bindings: serial: Convert rs485 bindings to json-schema
  dt-bindings: timer: Use non-empty ranges in example
  dt-bindings: arm-boards: typo fix
  dt-bindings: Add TI and Infineon VR Controllers as trivial devices
  dt-binding: usb: add "super-speed-plus"
  dt-bindings: rcar-csi2: Convert bindings to json-schema
  dt-bindings: iio: adc: ad7606: Fix wrong maxItems value
  dt-bindings: Convert Faraday FTIDE010 to DT schema
  dt-bindings: Create DT bindings for PATA controllers
  dt-bindings: Create DT bindings for SATA controllers
  dt: bindings: add vendor prefix for Kamstrup A/S
  ...
 2020-01-30 07:47:58 -08:00
Linus Torvalds
1c715a659a Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 
Pull networking fixes from David Miller:

 1) Various mptcp fixupes from Florian Westphal and Geery Uytterhoeven.

 2) Don't clear the node/port GUIDs after we've assigned the correct
    values to them. From Leon Romanovsky.

* git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net:
  net/core: Do not clear VF index for node/port GUIDs query
  mptcp: Fix undefined mptcp_handle_ipv6_mapped for modular IPV6
  net: drop_monitor: Use kstrdup
  udp: document udp_rcv_segment special case for looped packets
  mptcp: MPTCP_HMAC_TEST should depend on MPTCP
  mptcp: Fix incorrect IPV6 dependency check
  Revert "MAINTAINERS: mptcp@ mailing list is moderated"
  mptcp: handle tcp fallback when using syn cookies
  mptcp: avoid a lockdep splat when mcast group was joined
  mptcp: fix panic on user pointer access
  mptcp: defer freeing of cached ext until last moment
  net: mvneta: fix XDP support if sw bm is used as fallback
  sch_choke: Use kvcalloc
  mptcp: Fix build with PROC_FS disabled.
  MAINTAINERS: mptcp@ mailing list is moderated
 2020-01-30 07:42:00 -08:00
Linus Torvalds
5e237e8c77 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/ide 
Pull IDE updates from David Miller:

 1) Fix mem region name in tx4949ide driver, from Christophe JAILLET.

 2) Make drive->dn read only, it should not be changeable by users. From
    Dan Carpenter.

 3) Several cast fixups from Krzysztof Kozlowski.

There is also going to be a removal of a now unused IDE driver, but that
will come via the MIPS tree.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/ide:
  ide: make drive->dn read only
  ide: serverworks: potential overflow in svwks_set_pio_mode()
  cmd64x: potential buffer overflow in cmd64x_program_timings()
  ide: remove unneeded header include path to drivers/ide
  ide: qd65xx: Fix cast to pointer from integer of different size
  ide: ht6560b: Fix cast to pointer from integer of different size
  ide: remove set but not used variable 'hwif'
  ide: remove unnecessary touch_softlockup_watchdog
  ide: tx4939ide: Fix the name used in a 'devm_request_mem_region()' call
  ide: Use dev_get_drvdata where possible
 2020-01-30 07:39:10 -08:00
Linus Torvalds
9ca4c6429f Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc 
Pull sparc updates from David Miller:

 1) Add a proper .exit.data section.

 2) Fix ipc64_perm type definition, from Arnd Bergmann.

 3) Support folded p4d page tables on sparc64, from Mike Rapport.

 4) Remove uses of struct timex, also from Arnd Bergmann.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc:
  y2038: sparc: remove use of struct timex
  sparc64: add support for folded p4d page tables
  sparc/console: kill off obsolete declarations
  sparc32: fix struct ipc64_perm type definition
  sparc32, leon: Stop adding vendor and device id to prom ambapp path components
  sparc: Add .exit.data section.
  sparc: remove unneeded uapi/asm/statfs.h
 2020-01-30 07:36:43 -08:00
Linus Torvalds
11f2534bae arm64 KVM fix: set the correct MDCR_EL2 register value on the first run 
of a vCPU.
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Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

Pull arm64 KVM fix from Catalin Marinas:
 "Set the correct MDCR_EL2 register value on the first run of a vCPU"

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  KVM: arm64: Write arch.mdcr_el2 changes since last vcpu_load on VHE
 2020-01-30 07:34:33 -08:00
Leon Romanovsky
9fbf082f56 net/core: Do not clear VF index for node/port GUIDs query 
VF numbers were assigned to node_guid and port_guid, but cleared
right before such query calls were issued. It caused to return
node/port GUIDs of VF index 0 for all VFs.

Fixes: 30aad41721 ("net/core: Add support for getting VF GUIDs")
Reported-by: Adrian Chiris <adrianc@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
 2020-01-30 15:20:26 +01:00
Arnd Bergmann
d68712ee35 y2038: sparc: remove use of struct timex 
'struct timex' is one of the last users of 'struct timeval' and is
only referenced in one place in the kernel any more, to convert the
user space timex into the kernel-internal version on sparc64, with a
different tv_usec member type.

As a preparation for hiding the time_t definition and everything
using that in the kernel, change the implementation once more
to only convert the timeval member, and then enclose the
struct definition in an #ifdef.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Julian Calaby <julian.calaby@gmail.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
 2020-01-30 11:14:28 +01:00
Mike Rapoport
5637bc5048 sparc64: add support for folded p4d page tables 
Implement primitives necessary for the 4th level folding, add walks of p4d
level where appropriate and replace 5level-fixup.h with pgtable-nop4d.h.

Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
 2020-01-30 11:14:28 +01:00
Dan Carpenter
2fd3c5c617 ide: make drive->dn read only 
The IDE core always sets ->dn correctly so changing it is never
required.

Setting it to a different value than assigned by IDE core is very likely
to result in data corruption (due to wrong transfer timings being set on
the controller etc.)

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Tested-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
 2020-01-30 11:03:24 +01:00
Geert Uytterhoeven
31484d56ca mptcp: Fix undefined mptcp_handle_ipv6_mapped for modular IPV6 
If CONFIG_MPTCP=y, CONFIG_MPTCP_IPV6=n, and CONFIG_IPV6=m:

    ERROR: "mptcp_handle_ipv6_mapped" [net/ipv6/ipv6.ko] undefined!

This does not happen if CONFIG_MPTCP_IPV6=y, as CONFIG_MPTCP_IPV6
selects CONFIG_IPV6, and thus forces CONFIG_IPV6 builtin.

As exporting a symbol for an empty function would be a bit wasteful, fix
this by providing a dummy version of mptcp_handle_ipv6_mapped() for the
CONFIG_MPTCP_IPV6=n case.

Rename mptcp_handle_ipv6_mapped() to mptcpv6_handle_mapped(), to make it
clear this is a pure-IPV6 function, just like mptcpv6_init().

Fixes: cec37a6e41 ("mptcp: Handle MP_CAPABLE options for outgoing connections")
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
 2020-01-30 10:55:54 +01:00
Joe Perches
72d62c4e42 net: drop_monitor: Use kstrdup 
Convert the equivalent but rather odd uses of kmemdup with
__GFP_ZERO to the more common kstrdup and avoid unnecessary
zeroing of copied over memory.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
 2020-01-30 10:03:37 +01:00
Willem de Bruijn
d0208bf4da udp: document udp_rcv_segment special case for looped packets 
Commit 6cd021a58c ("udp: segment looped gso packets correctly")
fixes an issue with rare udp gso multicast packets looped onto the
receive path.

The stable backport makes the narrowest change to target only these
packets, when needed. As opposed to, say, expanding __udp_gso_segment,
which is harder to reason to be free from unintended side-effects.

But the resulting code is hardly self-describing.
Document its purpose and rationale.

Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
 2020-01-30 09:59:53 +01:00
Geert Uytterhoeven
389b8fb3c4 mptcp: MPTCP_HMAC_TEST should depend on MPTCP 
As the MPTCP HMAC test is integrated into the MPTCP code, it can be
built only when MPTCP is enabled.  Hence when MPTCP is disabled, asking
the user if the test code should be enabled is futile.

Wrap the whole block of MPTCP-specific config options inside a check for
MPTCP.  While at it, drop the "default n" for MPTCP_HMAC_TEST, as that
is the default anyway.

Fixes: 65492c5a6a ("mptcp: move from sha1 (v0) to sha256 (v1)")
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
 2020-01-30 09:55:37 +01:00
Geert Uytterhoeven
8e1974a2a0 mptcp: Fix incorrect IPV6 dependency check 
If CONFIG_MPTCP=y, CONFIG_MPTCP_IPV6=n, and CONFIG_IPV6=m:

    net/mptcp/protocol.o: In function `__mptcp_tcp_fallback':
    protocol.c:(.text+0x786): undefined reference to `inet6_stream_ops'

Fix this by checking for CONFIG_MPTCP_IPV6 instead of CONFIG_IPV6, like
is done in all other places in the mptcp code.

Fixes: 8ab183deb2 ("mptcp: cope with later TCP fallback")
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
 2020-01-30 09:55:37 +01:00
Dave Airlie
d47c7f0626 Merge branch 'linux-5.6' of git://github.com/skeggsb/linux into drm-next 
A couple of OOPS fixes, fixes for TU1xx if firmware isn't available,
better behaviour in the face of GPU faults, and a patch to make HD
audio work again after runpm changes.

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Ben Skeggs <skeggsb@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/ <CACAvsv4xcLF6Ahh7UYEesn-wBEksd2da+ghusBAdODMrH7Sz2A@mail.gmail.com
 2020-01-30 15:18:38 +10:00
Linus Torvalds
39bed42de2 hmm related patches for 5.6 
This small series revises the names in mmu_notifier to make the code
 clearer and more readable.
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Merge tag 'for-linus-hmm' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma

Pull mmu_notifier updates from Jason Gunthorpe:
 "This small series revises the names in mmu_notifier to make the code
  clearer and more readable"

* tag 'for-linus-hmm' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma:
  mm/mmu_notifiers: Use 'interval_sub' as the variable for mmu_interval_notifier
  mm/mmu_notifiers: Use 'subscription' as the variable name for mmu_notifier
  mm/mmu_notifier: Rename struct mmu_notifier_mm to mmu_notifier_subscriptions
 2020-01-29 19:56:50 -08:00
Linus Torvalds
83fa805bcb threads-v5.6 
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Merge tag 'threads-v5.6' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux

Pull thread management updates from Christian Brauner:
 "Sargun Dhillon over the last cycle has worked on the pidfd_getfd()
  syscall.

  This syscall allows for the retrieval of file descriptors of a process
  based on its pidfd. A task needs to have ptrace_may_access()
  permissions with PTRACE_MODE_ATTACH_REALCREDS (suggested by Oleg and
  Andy) on the target.

  One of the main use-cases is in combination with seccomp's user
  notification feature. As a reminder, seccomp's user notification
  feature was made available in v5.0. It allows a task to retrieve a
  file descriptor for its seccomp filter. The file descriptor is usually
  handed of to a more privileged supervising process. The supervisor can
  then listen for syscall events caught by the seccomp filter of the
  supervisee and perform actions in lieu of the supervisee, usually
  emulating syscalls. pidfd_getfd() is needed to expand its uses.

  There are currently two major users that wait on pidfd_getfd() and one
  future user:

   - Netflix, Sargun said, is working on a service mesh where users
     should be able to connect to a dns-based VIP. When a user connects
     to e.g. 1.2.3.4:80 that runs e.g. service "foo" they will be
     redirected to an envoy process. This service mesh uses seccomp user
     notifications and pidfd to intercept all connect calls and instead
     of connecting them to 1.2.3.4:80 connects them to e.g.
     127.0.0.1:8080.

   - LXD uses the seccomp notifier heavily to intercept and emulate
     mknod() and mount() syscalls for unprivileged containers/processes.
     With pidfd_getfd() more uses-cases e.g. bridging socket connections
     will be possible.

   - The patchset has also seen some interest from the browser corner.
     Right now, Firefox is using a SECCOMP_RET_TRAP sandbox managed by a
     broker process. In the future glibc will start blocking all signals
     during dlopen() rendering this type of sandbox impossible. Hence,
     in the future Firefox will switch to a seccomp-user-nofication
     based sandbox which also makes use of file descriptor retrieval.
     The thread for this can be found at
     https://sourceware.org/ml/libc-alpha/2019-12/msg00079.html

  With pidfd_getfd() it is e.g. possible to bridge socket connections
  for the supervisee (binding to a privileged port) and taking actions
  on file descriptors on behalf of the supervisee in general.

  Sargun's first version was using an ioctl on pidfds but various people
  pushed for it to be a proper syscall which he duely implemented as
  well over various review cycles. Selftests are of course included.
  I've also added instructions how to deal with merge conflicts below.

  There's also a small fix coming from the kernel mentee project to
  correctly annotate struct sighand_struct with __rcu to fix various
  sparse warnings. We've received a few more such fixes and even though
  they are mostly trivial I've decided to postpone them until after -rc1
  since they came in rather late and I don't want to risk introducing
  build warnings.

  Finally, there's a new prctl() command PR_{G,S}ET_IO_FLUSHER which is
  needed to avoid allocation recursions triggerable by storage drivers
  that have userspace parts that run in the IO path (e.g. dm-multipath,
  iscsi, etc). These allocation recursions deadlock the device.

  The new prctl() allows such privileged userspace components to avoid
  allocation recursions by setting the PF_MEMALLOC_NOIO and
  PF_LESS_THROTTLE flags. The patch carries the necessary acks from the
  relevant maintainers and is routed here as part of prctl()
  thread-management."

* tag 'threads-v5.6' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux:
  prctl: PR_{G,S}ET_IO_FLUSHER to support controlling memory reclaim
  sched.h: Annotate sighand_struct with __rcu
  test: Add test for pidfd getfd
  arch: wire up pidfd_getfd syscall
  pid: Implement pidfd_getfd syscall
  vfs, fdtable: Add fget_task helper
 2020-01-29 19:38:34 -08:00
Linus Torvalds
896f8d23d0 for-5.6/io_uring-vfs-2020-01-29 
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Merge tag 'for-5.6/io_uring-vfs-2020-01-29' of git://git.kernel.dk/linux-block

Pull io_uring updates from Jens Axboe:

 - Support for various new opcodes (fallocate, openat, close, statx,
   fadvise, madvise, openat2, non-vectored read/write, send/recv, and
   epoll_ctl)

 - Faster ring quiesce for fileset updates

 - Optimizations for overflow condition checking

 - Support for max-sized clamping

 - Support for probing what opcodes are supported

 - Support for io-wq backend sharing between "sibling" rings

 - Support for registering personalities

 - Lots of little fixes and improvements

* tag 'for-5.6/io_uring-vfs-2020-01-29' of git://git.kernel.dk/linux-block: (64 commits)
  io_uring: add support for epoll_ctl(2)
  eventpoll: support non-blocking do_epoll_ctl() calls
  eventpoll: abstract out epoll_ctl() handler
  io_uring: fix linked command file table usage
  io_uring: support using a registered personality for commands
  io_uring: allow registering credentials
  io_uring: add io-wq workqueue sharing
  io-wq: allow grabbing existing io-wq
  io_uring/io-wq: don't use static creds/mm assignments
  io-wq: make the io_wq ref counted
  io_uring: fix refcounting with batched allocations at OOM
  io_uring: add comment for drain_next
  io_uring: don't attempt to copy iovec for READ/WRITE
  io_uring: honor IOSQE_ASYNC for linked reqs
  io_uring: prep req when do IOSQE_ASYNC
  io_uring: use labeled array init in io_op_defs
  io_uring: optimise sqe-to-req flags translation
  io_uring: remove REQ_F_IO_DRAINED
  io_uring: file switch work needs to get flushed on exit
  io_uring: hide uring_fd in ctx
  ...
 2020-01-29 18:53:37 -08:00
Linus Torvalds
33c84e89ab SCSI misc on 20200129 
This series is slightly unusual because it includes Arnd's compat
 ioctl tree here:
 
 1c46a2cf2d Merge tag 'block-ioctl-cleanup-5.6' into 5.6/scsi-queue
 
 Excluding Arnd's changes, this is mostly an update of the usual
 drivers: megaraid_sas, mpt3sas, qla2xxx, ufs, lpfc, hisi_sas.  There
 are a couple of core and base updates around error propagation and
 atomicity in the attribute container base we use for the SCSI
 transport classes.  The rest is minor changes and updates.
 
 Signed-off-by: James E.J. Bottomley <jejb@linux.ibm.com>
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Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi

Pull SCSI updates from James Bottomley:
 "This series is slightly unusual because it includes Arnd's compat
  ioctl tree here:

    1c46a2cf2d Merge tag 'block-ioctl-cleanup-5.6' into 5.6/scsi-queue

  Excluding Arnd's changes, this is mostly an update of the usual
  drivers: megaraid_sas, mpt3sas, qla2xxx, ufs, lpfc, hisi_sas.

  There are a couple of core and base updates around error propagation
  and atomicity in the attribute container base we use for the SCSI
  transport classes.

  The rest is minor changes and updates"

* tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (149 commits)
  scsi: hisi_sas: Rename hisi_sas_cq.pci_irq_mask
  scsi: hisi_sas: Add prints for v3 hw interrupt converge and automatic affinity
  scsi: hisi_sas: Modify the file permissions of trigger_dump to write only
  scsi: hisi_sas: Replace magic number when handle channel interrupt
  scsi: hisi_sas: replace spin_lock_irqsave/spin_unlock_restore with spin_lock/spin_unlock
  scsi: hisi_sas: use threaded irq to process CQ interrupts
  scsi: ufs: Use UFS device indicated maximum LU number
  scsi: ufs: Add max_lu_supported in struct ufs_dev_info
  scsi: ufs: Delete is_init_prefetch from struct ufs_hba
  scsi: ufs: Inline two functions into their callers
  scsi: ufs: Move ufshcd_get_max_pwr_mode() to ufshcd_device_params_init()
  scsi: ufs: Split ufshcd_probe_hba() based on its called flow
  scsi: ufs: Delete struct ufs_dev_desc
  scsi: ufs: Fix ufshcd_probe_hba() reture value in case ufshcd_scsi_add_wlus() fails
  scsi: ufs-mediatek: enable low-power mode for hibern8 state
  scsi: ufs: export some functions for vendor usage
  scsi: ufs-mediatek: add dbg_register_dump implementation
  scsi: qla2xxx: Fix a NULL pointer dereference in an error path
  scsi: qla1280: Make checking for 64bit support consistent
  scsi: megaraid_sas: Update driver version to 07.713.01.00-rc1
  ...
 2020-01-29 18:16:16 -08:00
Linus Torvalds
e9f8ca0ae7 - Fix DM core's potential for q->make_request_fn NULL pointer in the 
unlikely case that a DM device is created without a DM table and
   then accessed due to upper-layer userspace code or user error.
 
 - Fix DM thin-provisioning's metadata_pre_commit_callback to not use
   memory after it is free'd.  Also refactor code to disallow changing
   the thin-pool's data device once in use -- doing so guarantees smae
   lifetime of pool's data device relative to the pool metadata.
 
 - Fix DM space maps used by DM thinp and DM cache to avoid reuse of a
   already used block. This race was identified with extremely heavy
   snapshot use in the context of DM thin provisioning.
 
 - Fix DM raid's table status relative to an active rebuild.
 
 - Fix DM crypt to use GFP_NOIO rather than GFP_NOFS in call to
   skcipher_request_alloc(). Also fix benbi IV constructor crash if
   used in authenticated mode.
 
 - Add DM crypt support for Elephant diffuser to allow for Bitlocker
   compatibility.
 
 - Fix DM verity target to not prefetch hash blocks for data that has
   already been verified.
 
 - Fix DM writecache's incorrect flush sequence during commit when in
   SSD mode.
 
 - Improve DM writecache's sequential write performance on SSDs.
 
 - Add DM zoned target support for zone sizes smaller than 128MiB.
 
 - Add DM multipath 'queue_if_no_path_timeout_secs' module param to
   allow timeout if path isn't reinstated. This allows users a kernel
   safety-net against IO hanging indefinitely, due to no active paths,
   that has historically only been provided by multipathd userspace.
 
 - Various DM code cleanups to use true/false rather than 1/0, a
   variable rename in dm-dust, and fix for a math error in comment for
   DM thin metadata's ondisk format.
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Merge tag 'for-5.6/dm-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm

Pull device mapper updates from Mike Snitzer:

 - Fix DM core's potential for q->make_request_fn NULL pointer in the
   unlikely case that a DM device is created without a DM table and then
   accessed due to upper-layer userspace code or user error.

 - Fix DM thin-provisioning's metadata_pre_commit_callback to not use
   memory after it is free'd. Also refactor code to disallow changing
   the thin-pool's data device once in use -- doing so guarantees smae
   lifetime of pool's data device relative to the pool metadata.

 - Fix DM space maps used by DM thinp and DM cache to avoid reuse of a
   already used block. This race was identified with extremely heavy
   snapshot use in the context of DM thin provisioning.

 - Fix DM raid's table status relative to an active rebuild.

 - Fix DM crypt to use GFP_NOIO rather than GFP_NOFS in call to
   skcipher_request_alloc(). Also fix benbi IV constructor crash if used
   in authenticated mode.

 - Add DM crypt support for Elephant diffuser to allow for Bitlocker
   compatibility.

 - Fix DM verity target to not prefetch hash blocks for data that has
   already been verified.

 - Fix DM writecache's incorrect flush sequence during commit when in
   SSD mode.

 - Improve DM writecache's sequential write performance on SSDs.

 - Add DM zoned target support for zone sizes smaller than 128MiB.

 - Add DM multipath 'queue_if_no_path_timeout_secs' module param to
   allow timeout if path isn't reinstated. This allows users a kernel
   safety-net against IO hanging indefinitely, due to no active paths,
   that has historically only been provided by multipathd userspace.

 - Various DM code cleanups to use true/false rather than 1/0, a
   variable rename in dm-dust, and fix for a math error in comment for
   DM thin metadata's ondisk format.

* tag 'for-5.6/dm-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm: (21 commits)
  dm: fix potential for q->make_request_fn NULL pointer
  dm writecache: improve performance of large linear writes on SSDs
  dm mpath: Add timeout mechanism for queue_if_no_path
  dm thin: change data device's flush_bio to be member of struct pool
  dm thin: don't allow changing data device during thin-pool reload
  dm thin: fix use-after-free in metadata_pre_commit_callback
  dm thin metadata: use pool locking at end of dm_pool_metadata_close
  dm writecache: fix incorrect flush sequence when doing SSD mode commit
  dm crypt: fix benbi IV constructor crash if used in authenticated mode
  dm crypt: Implement Elephant diffuser for Bitlocker compatibility
  dm space map common: fix to ensure new block isn't already in use
  dm verity: don't prefetch hash blocks for already-verified data
  dm crypt: fix GFP flags passed to skcipher_request_alloc()
  dm thin metadata: Fix trivial math error in on-disk format documentation
  dm thin metadata: use true/false for bool variable
  dm snapshot: use true/false for bool variable
  dm bio prison v2: use true/false for bool variable
  dm mpath: use true/false for bool variable
  dm zoned: support zone sizes smaller than 128MiB
  dm raid: table line rebuild status fixes
  ...
 2020-01-29 18:08:49 -08:00
Linus Torvalds
05ef8b97dd It has been a relatively quiet cycle for documentation, but there's still a 
couple of things of note:
 
  - Conversion of the NFS documentation to RST
 
  - A new document on how to help with documentation (and a maintainer
    profile entry too)
 
 Plus the usual collection of typo fixes, etc.
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Merge tag 'docs-5.6' of git://git.lwn.net/linux

Pull documentation updates from Jonathan Corbet:
 "It has been a relatively quiet cycle for documentation, but there's
  still a couple of things of note:

   - Conversion of the NFS documentation to RST

   - A new document on how to help with documentation (and a maintainer
     profile entry too)

  Plus the usual collection of typo fixes, etc"

* tag 'docs-5.6' of git://git.lwn.net/linux: (40 commits)
  docs: filesystems: add overlayfs to index.rst
  docs: usb: remove some broken references
  scripts/find-unused-docs: Fix massive false positives
  docs: nvdimm: use ReST notation for subsection
  zram: correct documentation about sysfs node of huge page writeback
  Documentation: zram: various fixes in zram.rst
  Add a maintainer entry profile for documentation
  Add a document on how to contribute to the documentation
  docs: Keep up with the location of NoUri
  Documentation: Call out example SYM_FUNC_* usage as x86-specific
  Documentation: nfs: fault_injection: convert to ReST
  Documentation: nfs: pnfs-scsi-server: convert to ReST
  Documentation: nfs: convert pnfs-block-server to ReST
  Documentation: nfs: idmapper: convert to ReST
  Documentation: convert nfsd-admin-interfaces to ReST
  Documentation: nfs-rdma: convert to ReST
  Documentation: nfsroot.rst: COSMETIC: refill a paragraph
  Documentation: nfsroot.txt: convert to ReST
  Documentation: convert nfs.txt to ReST
  Documentation: filesystems: convert vfat.txt to RST
  ...
 2020-01-29 15:27:31 -08:00
Linus Torvalds
08a3ef8f6b linux-kselftest-5.6-rc1-kunit 
This kunit update for Linux 5.6-rc1 consists of:
 
 -- Support for building kunit as a module from Alan Maguire
 -- AppArmor KUnit tests for policy unpack from Mike Salvatore
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Merge tag 'linux-kselftest-5.6-rc1-kunit' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest

Pull Kselftest kunit updates from Shuah Khan:
 "This kunit update consists of:

   - Support for building kunit as a module from Alan Maguire

   - AppArmor KUnit tests for policy unpack from Mike Salvatore"

* tag 'linux-kselftest-5.6-rc1-kunit' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest:
  kunit: building kunit as a module breaks allmodconfig
  kunit: update documentation to describe module-based build
  kunit: allow kunit to be loaded as a module
  kunit: remove timeout dependence on sysctl_hung_task_timeout_seconds
  kunit: allow kunit tests to be loaded as a module
  kunit: hide unexported try-catch interface in try-catch-impl.h
  kunit: move string-stream.h to lib/kunit
  apparmor: add AppArmor KUnit tests for policy unpack
 2020-01-29 15:25:34 -08:00
Linus Torvalds
ce7ae9d9fe linux-kselftest-5.6-rc1 
This Kselftest update for Linux 5.6-rc1 consists of several fixes to
 framework and individual tests. In addition, it enables LKDTM tests
 adding lkdtm target to kselftest Makefile.
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Merge tag 'linux-kselftest-5.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest

Pull Kselftest update from Shuah Khan:
 "This Kselftest update consists of several fixes to framework and
  individual tests.

  In addition, it enables LKDTM tests adding lkdtm target to kselftest
  Makefile"

* tag 'linux-kselftest-5.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest:
  selftests/ftrace: fix glob selftest
  selftests: settings: tests can be in subsubdirs
  kselftest: Minimise dependency of get_size on C library interfaces
  selftests/livepatch: Remove unused local variable in set_ftrace_enabled()
  selftests/livepatch: Replace set_dynamic_debug() with setup_config() in README
  selftests/lkdtm: Add tests for LKDTM targets
  selftests: Uninitialized variable in test_cgcore_proc_migration()
  selftests: fix build behaviour on targets' failures
 2020-01-29 15:24:03 -08:00
Linus Torvalds
22b17db4ea y2038: core, driver and file system changes 
These are updates to device drivers and file systems that for some reason
 or another were not included in the kernel in the previous y2038 series.
 
 I've gone through all users of time_t again to make sure the kernel is
 in a long-term maintainable state, replacing all remaining references
 to time_t with safe alternatives.
 
 Some related parts of the series were picked up into the nfsd, xfs,
 alsa and v4l2 trees. A final set of patches in linux-mm removes the now
 unused time_t/timeval/timespec types and helper functions after all five
 branches are merged for linux-5.6, ensuring that no new users get merged.
 
 As a result, linux-5.6, or my backport of the patches to 5.4 [1], should
 be the first release that can serve as a base for a 32-bit system designed
 to run beyond year 2038, with a few remaining caveats:
 
 - All user space must be compiled with a 64-bit time_t, which will be
   supported in the coming musl-1.2 and glibc-2.32 releases, along with
   installed kernel headers from linux-5.6 or higher.
 
 - Applications that use the system call interfaces directly need to be
   ported to use the time64 syscalls added in linux-5.1 in place of the
   existing system calls. This impacts most users of futex() and seccomp()
   as well as programming languages that have their own runtime environment
   not based on libc.
 
 - Applications that use a private copy of kernel uapi header files or
   their contents may need to update to the linux-5.6 version, in
   particular for sound/asound.h, xfs/xfs_fs.h, linux/input.h,
   linux/elfcore.h, linux/sockios.h, linux/timex.h and linux/can/bcm.h.
 
 - A few remaining interfaces cannot be changed to pass a 64-bit time_t
   in a compatible way, so they must be configured to use CLOCK_MONOTONIC
   times or (with a y2106 problem) unsigned 32-bit timestamps. Most
   importantly this impacts all users of 'struct input_event'.
 
 - All y2038 problems that are present on 64-bit machines also apply to
   32-bit machines. In particular this affects file systems with on-disk
   timestamps using signed 32-bit seconds: ext4 with ext3-style small
   inodes, ext2, xfs (to be fixed soon) and ufs.
 
 Changes since v1 [2]:
 
 - Add Acks I received
 - Rebase to v5.5-rc1, dropping patches that got merged already
 - Add NFS, XFS and the final three patches from another series
 - Rewrite etnaviv patches
 - Add one late revert to avoid an etnaviv regression
 
 [1] https://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git/log/?h=y2038-endgame
 [2] https://lore.kernel.org/lkml/20191108213257.3097633-1-arnd@arndb.de/
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Merge tag 'y2038-drivers-for-v5.6-signed' of git://git.kernel.org:/pub/scm/linux/kernel/git/arnd/playground

Pull y2038 updates from Arnd Bergmann:
 "Core, driver and file system changes

  These are updates to device drivers and file systems that for some
  reason or another were not included in the kernel in the previous
  y2038 series.

  I've gone through all users of time_t again to make sure the kernel is
  in a long-term maintainable state, replacing all remaining references
  to time_t with safe alternatives.

  Some related parts of the series were picked up into the nfsd, xfs,
  alsa and v4l2 trees. A final set of patches in linux-mm removes the
  now unused time_t/timeval/timespec types and helper functions after
  all five branches are merged for linux-5.6, ensuring that no new users
  get merged.

  As a result, linux-5.6, or my backport of the patches to 5.4 [1],
  should be the first release that can serve as a base for a 32-bit
  system designed to run beyond year 2038, with a few remaining caveats:

   - All user space must be compiled with a 64-bit time_t, which will be
     supported in the coming musl-1.2 and glibc-2.32 releases, along
     with installed kernel headers from linux-5.6 or higher.

   - Applications that use the system call interfaces directly need to
     be ported to use the time64 syscalls added in linux-5.1 in place of
     the existing system calls. This impacts most users of futex() and
     seccomp() as well as programming languages that have their own
     runtime environment not based on libc.

   - Applications that use a private copy of kernel uapi header files or
     their contents may need to update to the linux-5.6 version, in
     particular for sound/asound.h, xfs/xfs_fs.h, linux/input.h,
     linux/elfcore.h, linux/sockios.h, linux/timex.h and
     linux/can/bcm.h.

   - A few remaining interfaces cannot be changed to pass a 64-bit
     time_t in a compatible way, so they must be configured to use
     CLOCK_MONOTONIC times or (with a y2106 problem) unsigned 32-bit
     timestamps. Most importantly this impacts all users of 'struct
     input_event'.

   - All y2038 problems that are present on 64-bit machines also apply
     to 32-bit machines. In particular this affects file systems with
     on-disk timestamps using signed 32-bit seconds: ext4 with
     ext3-style small inodes, ext2, xfs (to be fixed soon) and ufs"

[1] https://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git/log/?h=y2038-endgame

* tag 'y2038-drivers-for-v5.6-signed' of git://git.kernel.org:/pub/scm/linux/kernel/git/arnd/playground: (21 commits)
  Revert "drm/etnaviv: reject timeouts with tv_nsec >= NSEC_PER_SEC"
  y2038: sh: remove timeval/timespec usage from headers
  y2038: sparc: remove use of struct timex
  y2038: rename itimerval to __kernel_old_itimerval
  y2038: remove obsolete jiffies conversion functions
  nfs: fscache: use timespec64 in inode auxdata
  nfs: fix timstamp debug prints
  nfs: use time64_t internally
  sunrpc: convert to time64_t for expiry
  drm/etnaviv: avoid deprecated timespec
  drm/etnaviv: reject timeouts with tv_nsec >= NSEC_PER_SEC
  drm/msm: avoid using 'timespec'
  hfs/hfsplus: use 64-bit inode timestamps
  hostfs: pass 64-bit timestamps to/from user space
  packet: clarify timestamp overflow
  tsacct: add 64-bit btime field
  acct: stop using get_seconds()
  um: ubd: use 64-bit time_t where possible
  xtensa: ISS: avoid struct timeval
  dlm: use SO_SNDTIMEO_NEW instead of SO_SNDTIMEO_OLD
  ...
 2020-01-29 14:55:47 -08:00
Linus Torvalds
a4fe2b4d87 Printk changes for 5.6 
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Merge tag 'printk-for-5.6' of git://git.kernel.org/pub/scm/linux/kernel/git/pmladek/printk

Pull printk update from Petr Mladek:
 "Prevent replaying log on all consoles"

* tag 'printk-for-5.6' of git://git.kernel.org/pub/scm/linux/kernel/git/pmladek/printk:
  printk: fix exclusive_console replaying
 2020-01-29 14:53:23 -08:00
Jens Axboe
3e4827b05d io_uring: add support for epoll_ctl(2) 
This adds IORING_OP_EPOLL_CTL, which can perform the same work as the
epoll_ctl(2) system call.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
 2020-01-29 15:46:09 -07:00
Jens Axboe
39220e8d4a eventpoll: support non-blocking do_epoll_ctl() calls 
Also make it available outside of epoll, along with the helper that
decides if we need to copy the passed in epoll_event.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
 2020-01-29 15:45:47 -07:00
Jens Axboe
58e41a44c4 eventpoll: abstract out epoll_ctl() handler 
No functional changes in this patch.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
 2020-01-29 15:45:42 -07:00
Jens Axboe
f86cd20c94 io_uring: fix linked command file table usage 
We're not consistent in how the file table is grabbed and assigned if we
have a command linked that requires the use of it.

Add ->file_table to the io_op_defs[] array, and use that to determine
when to grab the table instead of having the handlers set it if they
need to defer. This also means we can kill the IO_WQ_WORK_NEEDS_FILES
flag. We always initialize work->files, so io-wq can just check for
that.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
 2020-01-29 13:46:44 -07:00
Linus Torvalds
3893c2025f Changes since last update: 
- fix an out-of-bound read access introduced in v5.3,
    which could rarely cause data corruption;
 
  - various cleanup patches.
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Merge tag 'erofs-for-5.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs

Pull erofs updates from Gao Xiang:
 "A regression fix, several cleanups and (maybe) plus an upcoming new
  mount api convert patch as a part of vfs update are considered
  available for this cycle.

  All commits have been in linux-next and tested with no smoke out.

  Summary:

   - fix an out-of-bound read access introduced in v5.3, which could
     rarely cause data corruption

   - various cleanup patches"

* tag 'erofs-for-5.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs:
  erofs: clean up z_erofs_submit_queue()
  erofs: fold in postsubmit_is_all_bypassed()
  erofs: fix out-of-bound read for shifted uncompressed block
  erofs: remove void tagging/untagging of workgroup pointers
  erofs: remove unused tag argument while registering a workgroup
  erofs: remove unused tag argument while finding a workgroup
  erofs: correct indentation of an assigned structure inside a function
 2020-01-29 11:47:08 -08:00
Linus Torvalds
5307040655 Merge branch 'work.adfs' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 
Pull adfs updates from Al Viro:
 "adfs stuff for this cycle"

* 'work.adfs' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (42 commits)
  fs/adfs: bigdir: Fix an error code in adfs_fplus_read()
  Documentation: update adfs filesystem documentation
  fs/adfs: mostly divorse inode number from indirect disc address
  fs/adfs: super: add support for E and E+ floppy image formats
  fs/adfs: super: extract filesystem block probe
  fs/adfs: dir: remove debug in adfs_dir_update()
  fs/adfs: super: fix inode dropping
  fs/adfs: bigdir: implement directory update support
  fs/adfs: bigdir: calculate and validate directory checkbyte
  fs/adfs: bigdir: directory validation strengthening
  fs/adfs: bigdir: extract directory validation
  fs/adfs: bigdir: factor out directory entry offset calculation
  fs/adfs: newdir: split out directory commit from update
  fs/adfs: newdir: clean up adfs_f_update()
  fs/adfs: newdir: merge adfs_dir_read() into adfs_f_read()
  fs/adfs: newdir: improve directory validation
  fs/adfs: newdir: factor out directory format validation
  fs/adfs: dir: use pointers to access directory head/tails
  fs/adfs: dir: add more efficient iterate() per-format method
  fs/adfs: dir: switch to iterate_shared method
  ...
 2020-01-29 11:45:09 -08:00